
Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Service and Maintenance 351Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.
Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage.
The brake lamps need to be
checked periodically to ensure
that they light when braking.
.
With a multi-point inspection,
your dealer can check the lamps
and note any concerns.
Shocks and Struts
Shocks and struts help aid in control
for a smoother ride.
.
Signs of wear may include
steering wheel vibration, bounce/
sway while braking, longer
stopping distance, or uneven
tire wear.
.
As part of the multi-point
inspection, trained dealer
technicians can visually inspect
the shocks and struts for signs of leaking, blown seals,
or damage, and can advise
when service is needed.
Tires
Tires need to be properly inflated,
rotated, and balanced. Maintaining
the tires can save money and fuel,
and can reduce the risk of tire
failure.
.
Signs that the tires need to be
replaced include three or more
visible treadwear indicators; cord
or fabric showing through the
rubber; cracks or cuts in the
tread or sidewall; or a bulge or
split in the tire.
.
Trained dealer technicians can
inspect and recommend the right
tires. Your dealer can also
provide tire/wheel balancing
services to ensure smooth
vehicle operation at all speeds.
Your dealer sells and services
name brand tires.
Vehicle Care
To help keep the vehicle looking like
new, vehicle care products are
available from your dealer. For information on how to clean and
protect the vehicle ’ s interior and
exterior, see Interior Care 0 338 and
Exterior Care 0 333 .
Wheel Alignment
Wheel alignment is critical for
ensuring that the tires deliver
optimal wear and performance.
.
Signs that the alignment may
need to be adjusted include
pulling, improper vehicle
handling, or unusual tire wear.
.
Your dealer has the required
equipment to ensure proper
wheel alignment.
Windshield
For safety, appearance, and the
best viewing, keep the windshield
clean and clear.
.
Signs of damage include
scratches, cracks, and chips.
.
Trained dealer technicians can
inspect the windshield and
recommend proper replacement
if needed.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Customer Information 365Service is available 24 hours a day,
365 days a year.
Calling for Service When calling Roadside Service,
have the following information
ready:
.
Your name, home address, and
home telephone number.
.
Telephone number of your
location.
.
Location of the vehicle.
.
Model, year, color, and license
plate number of the vehicle.
.
Odometer reading, Vehicle
Identification Number (VIN), and
delivery date of the vehicle.
.
Description of the problem.
Coverage
Services are provided for the
duration of the vehicle ’ s powertrain
warranty. In the U.S., anyone driving the
vehicle is covered. In Canada, a
person driving the vehicle without
permission from the owner is not
covered.
Roadside Service is not a part of the
New Vehicle Limited Warranty.
General Motors North America and
Cadillac reserve the right to make
any changes or discontinue the
Roadside Service program at any
time without notification.
General Motors North America and
Cadillac reserve the right to limit
services or payment to an owner or
driver if they decide the claims are
made too often, or the same type of
claim is made many times.
Cadillac Owner Privileges ™.
Emergency Fuel Delivery:
Delivery of enough fuel for the
vehicle to get to the nearest
service station.
.
Lock-Out Service: Service to
unlock the vehicle if you are
locked out. A remote unlock may
be available if you have OnStar. For security reasons, the driver
must present identification
before this service is given.
.
Emergency Tow from a Public
Road or Highway: Tow to the
nearest Cadillac dealer for
warranty service, or if the vehicle
was in a crash and cannot be
driven. Assistance is not given
when the vehicle is stuck in the
sand, mud, or snow.
.
Flat Tire Change: Service to
change a flat tire with a spare
tire. The spare tire, if equipped,
must be in good condition and
properly inflated. It is your
responsibility for the repair or
replacement of the tire if it is not
covered by the warranty.
.
Battery Jump Start: Service to
jump start a dead battery.
.
Trip Interruption Benefits and
Service: If your trip is
interrupted due to a warranty
failure, incidental expenses may
be reimbursed during the
Powertrain warranty period.
Items considered are hotel,
meals, and rental car or a

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
376 OnStar .
Obtain the Wi-Fi ®
hotspot name
or SSID and password,
if equipped.
Press
Q to connect to an
Advisor to:
.
Verify account information or
update contact information.
.
Get driving directions.
.
Receive a Diagnostic check of
the vehicle's key operating
systems.
.
Receive Roadside Assistance.
.
Manage Wi-Fi Settings,
if equipped.
Press
> to get a priority connection
to an OnStar Advisor available 24/
7 to:
.
Get help for an emergency.
.
Be a Good Samaritan or
respond to an AMBER Alert.
.
Get assistance in severe
weather or other crisis situations
and find evacuation routes. OnStar Services Emergency Emergency Services require an
active, OnStar subscription plan
(excludes Basic Plan). With
Automatic Crash Response, built-in
sensors can automatically alert a
specially trained OnStar Advisor
who is immediately connected in to
the vehicle to help.
Press
> for a priority connection to
an OnStar Advisor who can contact
emergency service providers, direct
them to your exact location, and
relay important information.
With OnStar Crisis Assist, specially
trained Advisors are available
24 hours a day, 7 days a week, to
provide a central point of contact,
assistance, and information during a
crisis.
With Roadside Assistance, Advisors
can locate a nearby service provider
to help with a flat tire, a battery
jump, or an empty gas tank. Security If equipped, OnStar provides these
services:
.
With Stolen Vehicle Assistance,
OnStar Advisors can use GPS to
pinpoint the vehicle and help
authorities quickly recover it.
.
With Remote Ignition Block,
if equipped, OnStar can block
the engine from being restarted.
.
With Stolen Vehicle Slowdown,
if equipped, OnStar can work
with law enforcement to
gradually slow the vehicle down.
Navigation OnStar navigation requires a
specific OnStar subscription plan.
Press
Q to receive Turn-by-Turn
directions or have them sent to the
vehicle ’ s navigation screen,
if equipped.
Turn-by-Turn Navigation
1. Press
Q to connect to an
Advisor.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
Index 385
Index A Accessories and
Modifications . . . . . . . . . . . . . . . . . . 262
Accessory Power . . . . . . . . . . . . . . . 206
Adaptive Cruise Control . . . . . . . . 223
Add-On Electrical Equipment . . . 260
Additional Information
OnStar ®
. . . . . . . . . . . . . . . . . . . . . . 379
Additional Maintenance
and Care . . . . . . . . . . . . . . . . . . . . . . 350
Adjustments
Lumbar, Front Seats . . . . . . . . . . . . 60
Lumbar, Rear Seats . . . . . . . . . . . . 68
Thigh Support . . . . . . . . . . . . . . . . . . 61
Air Cleaner/Filter, Engine . . . . . . . 273
Air Conditioning . . . . . . . . . . . 178, 185
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . 190
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 189
Airbag System
Check . . . . . . . . . . . . . . . . . . . . . . . . . . 87
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . . . 80
Passenger Sensing System . . . . 82
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 80
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . . 81 Airbag System (cont'd)
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 79
Where Are the Airbags? . . . . . . . . 78
Airbags
Adding Equipment to the
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . 86
Passenger Status Indicator . . . 130
Readiness Light . . . . . . . . . . . . . . 130
Servicing Airbag-Equipped
Vehicles . . . . . . . . . . . . . . . . . . . . . . . 86
System Check . . . . . . . . . . . . . . . . . . 76
Alarm
Vehicle Security . . . . . . . . . . . . . . . . 44
Alert
Lane Change . . . . . . . . . . . . . . . . . 246
Side Blind Zone (SBZA) . . . . . . 246
All-Season Tires . . . . . . . . . . . . . . . . 300
All-Wheel Drive . . . . . . . . . . . . 213, 284
Antilock Brake System (ABS) . . . 214
Warning Light . . . . . . . . . . . . . . . . . 135
Appearance Care
Exterior . . . . . . . . . . . . . . . . . . . . . . . 333
Interior . . . . . . . . . . . . . . . . . . . . . . . . 338
Armrest
Rear Seat . . . . . . . . . . . . . . . . . . . . . . 68
Armrest Storage . . . . . . . . . . . . . . . . 107

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
388 Index E Electric Parking Brake . . . . . . . . . . 214
Electric Parking Brake Light . . . . 134
Electrical Equipment,
Add-On . . . . . . . . . . . . . . . . . . . . . . . 260
Electrical System
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 290
Fuses and Circuit Breakers . . . 290
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 293
Overload . . . . . . . . . . . . . . . . . . . . . 289
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 295
Emergency
OnStar ®
. . . . . . . . . . . . . . . . . . . . . . 376
Engine
Air Cleaner/Filter . . . . . . . . . . . . . 273
Check and Service Engine
Soon Light . . . . . . . . . . . . . . . . . . 132
Compartment Overview . . . . . . . 265
Coolant . . . . . . . . . . . . . . . . . . . . . . . 277
Coolant Heater . . . . . . . . . . . . . . . 206
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 128 Engine (cont'd)
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . 137
Cooling System . . . . . . . . . . . . . . . 275
Cooling System Messages . . . 149
Drive Belt Routing . . . . . . . . . . . . 360
Exhaust . . . . . . . . . . . . . . . . . . . . . . 209
Oil Life System . . . . . . . . . . . . . . . 272
Oil Messages . . . . . . . . . . . . . . . . . 149
Oil Pressure Gauge . . . . . . . . . . 126
Oil Pressure Light . . . . . . . . . . . . 138
Overheating . . . . . . . . . . . . . . . . . . 280
Power Messages . . . . . . . . . . . . . 150
Running While Parked . . . . . . . . 210
Starting . . . . . . . . . . . . . . . . . . . . . . . 204
Engine Oil
Temperature Gauge . . . . . . . . . . 127
Entry Lighting . . . . . . . . . . . . . . . . . . . 175
Equipment, Towing . . . . . . . . . . . . . 259
Event Data Recorders . . . . . . . . . . 373
Exit Lighting . . . . . . . . . . . . . . . . . . . . 176
Extender, Safety Belt . . . . . . . . . . . . 75
Exterior Lamp Controls . . . . . . . . . 170
Exterior Lamps Off Reminder . . . 172
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . . . 176 F Features
Memory . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter,
Engine Air Cleaner . . . . . . . . . . . 273
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 172
Flashers, Hazard Warning . . . . . . 173
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 320
Changing . . . . . . . . . . . . . . . . . . . . . 321
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 341
Fluid
Automatic Transmission . . . . . . 273
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 283
Washer . . . . . . . . . . . . . . . . . . . . . . . 281
Forward Collision Alert
(FCA) System . . . . . . . . . . . . . . . . . 237
Frequency Statement
Radio . . . . . . . . . . . . . . . . . . . . . . . . . 371
Front Automatic Braking
(FAB) System . . . . . . . . . . . . . . . . . 240
Front Pedestrian Braking
(FPB) System . . . . . . . . . . . . . . . . . 241
Front Seats
Heated and Ventilated . . . . . . . . . . 64
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Additives . . . . . . . . . . . . . . . . . . . . . 253
Economy Driving . . . . . . . . . . . . . . . 27

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-9235592) -
2016 - crc - 11/6/15
394 Index Shift Lock Control Function
Check, Automatic
Transmission . . . . . . . . . . . . . . . . . . 285
Shifting
Into Park . . . . . . . . . . . . . . . . . . . . . . 207
Out of Park . . . . . . . . . . . . . . . . . . . 208
Side Blind Zone Alert (SBZA) . . . 246
Signals, Turn and
Lane-Change . . . . . . . . . . . . . . . . . 173
Spare Tire
Compact . . . . . . . . . . . . . . . . . . . . . . 326
Special Application Services . . . . 349
Specifications and
Capacities . . . . . . . . . . . . . . . . . . . . . 358
Speedometer . . . . . . . . . . . . . . . . . . . 123
StabiliTrak
OFF Light . . . . . . . . . . . . . . . . . . . . . 136
Start Assist, Hills . . . . . . . . . . . . . . . 216
Start Vehicle, Remote . . . . . . . . . . . 36
Starter Switch Check . . . . . . . . . . . 285
Starting the Engine . . . . . . . . . . . . . 204
Starting the Vehicle
Messages . . . . . . . . . . . . . . . . . . . . . 156
Steering . . . . . . . . . . . . . . . . . . . . . . . . 194
Heated Wheel . . . . . . . . . . . . . . . . . 111
Wheel Adjustment . . . . . . . . . . . . .110
Wheel Controls . . . . . . . . . . . . . . . . 111
Steering System Messages . . . . . 155 Storage
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Storage Areas
Armrest . . . . . . . . . . . . . . . . . . . . . . . 107
Center Console . . . . . . . . . . . . . . . 107
Convenience Net . . . . . . . . . . . . . 108
Glove Box . . . . . . . . . . . . . . . . . . . . 106
Instrument Panel . . . . . . . . . . . . . 106
Storage Compartments . . . . . . . . . 106
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 198
Summer Tires . . . . . . . . . . . . . . . . . . 301
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 54
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Sunshade
Rear Window . . . . . . . . . . . . . . . . . . . 54
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System
Forward Collision
Alert (FCA) . . . . . . . . . . . . . . . . . . 237
Infotainment . . . . . . . . . . . . . 177, 374
Night Vision . . . . . . . . . . . . . . . . . . 243
Systems
Driver Assistance . . . . . . . . . . . . . 230
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 124
Text Telephone (TTY) Users . . . . 364
Theft-Deterrent Systems . . . . . . . . . 46 Theft-Deterrent Systems (cont'd)
Immobilizer . . . . . . . . . . . . . . . . . . . . . 46
Thigh Support Adjustment . . . . . . . 61
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
All-Season . . . . . . . . . . . . . . . . . . . . 300
Buying New Tires . . . . . . . . . . . . . 315
Chains . . . . . . . . . . . . . . . . . . . . . . . . 319
Changing . . . . . . . . . . . . . . . . . . . . . 321
Compact Spare . . . . . . . . . . . . . . . 326
Designations . . . . . . . . . . . . . . . . . 303
Different Size . . . . . . . . . . . . . . . . . 316
If a Tire Goes Flat . . . . . . . . . . . . 320
Inspection . . . . . . . . . . . . . . . . . . . . 312
Low Profile . . . . . . . . . . . . . . . . . . . 300
Messages . . . . . . . . . . . . . . . . . . . . 156
Pressure . . . . . . . . . . . . . . . . . . . . . . 308
Pressure Light . . . . . . . . . . . . . . . . 137
Pressure Monitor Operation . . 309
Pressure Monitor System . . . . . 308
Rotation . . . . . . . . . . . . . . . . . . . . . . 313
Sidewall Labeling . . . . . . . . . . . . . 301
Terminology and Definitions . . 304
Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . . . 316
Wheel Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . . . 318
Wheel Replacement . . . . . . . . . . 318